In order to allow access to view reports, please follow the below mentioned steps:
Reports are assigned by permission roles and not by individuals. As such, roles will need to be set up by permission roles
Step 1: Go to "Administration" then "Security" and then hit "Assign Reports".
Step 2: Select the report you want the person to view and hit "edit"
Step 3: You can then add the role that you would like to be able to see the particular report.