Hello and welcome to x10hosting.
First, lets make sure you have done the following :
1. Signed up / confirmed hosting (
http://www.x10hosting.com/hosting )
2. Received e-mail with link to your Cpanel.
You will need to link your forum account to your hosting account. Once this is done, login to your Cpanel account, click on File Manager and go from there.
If you prefer FTP, you can login to your account and place your website info in the public_html directory.