Thank you for your reply, but I think I might need a bit more information:
1. What do you mean by "setup file"? Could you please explain how this file is used?
2. Could you please explain a little more about how you are installing the site using the Web Deployment Tool? If you are making a package, would you be willing to let us try importing it to see if we encounter the same issue?
3. How are you viewing the arabic letters when you see ��������?
Hopefully this will help to determine if this is an issue with the Web Deployment Tool or some other source.