When I access your public_html, there are many files and folder there, so I am not sure how to proceed.
Can you please identify the files associated with the current installation of OpenCart that will need to be copied to the folder public_html/shop
If you are unable to do that, please confirm that I can clone the whole public_html folder.
Also, please confirm that you are trying to achieve a clone, rather than moving the installaiton. This means that you will still have musalaya.com working. Alternatively, we can move the installation to public_html/shop, rather than copying it.
I am leaving this ticket in ARC (Awaiting Response from Customer) status and will be looking forward to your reply.