how do I permit someone to view my records
We are addressing your question as though you desired to share your tree with someone else rather than someone helping you by viewing your records. If this response or the other answers to your post do not answer your question please share some additional information that will help us better understand.
"The purpose of Family Tree is to allow family members to work together to build their family tree. If you would like to share Family Tree information and collaborate with others, INVITE THEM TO REGISTER FOR A FREE FamilySearch Account. They can do so by going to familysearch.org and clicking the Free Account button in the upper right corner of the page.
The above can be found at this link in the Help Center. https://www.familysearch.org/help/helpcenter/article/how-do-i-share-information-on-family-tree
After creating their account, they will be able to build their tree. As soon as they come to the first deceased ancestor, you could give them the ID in your tree and they would add that parent by ID and their tree would populate. All living people are in a protected private space and only the person who created them can see them. This means that each living person would have different ID's in each individual tree. When an ancestor is deceased, everyone sees the same information.
It is always fun and exciting to share our trees. We hope this information helps you succeed in FamilySearch.
What records are you referring to? If the records are for living individuals, FamilySearch protects the privacy of living people. You see them only if you created them. The following article link will explain the policy.
If you are referring to deceased individuals, anyone can view the records in Family Tree. They can also contribute information to those records. FamilySearch is a worldwide, community Tree, where we ask our users to collaborate. You may wish to read the following article.
If you give someone your helper number, they can help you in Family Tree.
Only members of the church can use the helper function. So for example if a non-member is attempting to show the tree to a family member who is a non-member the helper function cannot be used.