Unfortunately using the file manager it's not possible to recursively change the file permission.
To change file access permissions you need to use the chmod command using shell. It has -R or –recursive option that change files and directories recursively.
If you want to recursively change the permission of administrator folder to 755, you can use the below command.
-securelve_sh-4.1$ chmod 755 -R administrator
The above command will change permission of the folder 'administrator' to 755 as well as all files/folders under the 'administrator' folder to 755.