Hi Ayaan_Ali
I am Dave, I will help you with this.
All the UWP apps and Store Apps and games are stored in a highly protected folder named WindowsApps in the C:\Program Files folder, that folder is not accessible and if you change permissions on that folder, most of the apps in Windows will stop functioning
To see the exact location of the Store app executable, follow these steps:
Open Task Manager, select the Processes Tab
Right click any column header and turn on the Command Line column
Open the Store App, then when you see that process in Task Manager, click the small arrow beside the Store process and in the Command Line column, you will see the location of the Store executable
The location is usually something like this:
C:\Program Files\WindowsApps\Microsoft.WindowsStore_22112.1401.2.0_x64__8wekyb3d8bbwe\WinStore.App.exe