Do you want to move a XenForo forum from a subdomain (like say forum.yourdomain.com) to the root domain (yourdomain.com)? The process is fairly simple and easy to follow. Here is a complete step by step guide.
Cpanel
How to Protect XenForo Admin Area with .htaccess
XenForo admin area isn’t inside a directory but is accessible via the admin.php file. So one can’t add htaccess based password protection to a directory
How to Create MySQL Database For XenForo in Various Panels
CPanel and Plesk provide an easy to use front end option to create databases, create users and assign correct permissions to be able to use in XenForo.