Hello,
You can access your cPanel via x10hosting's account control panel (
https://x10hosting.com/control/ )
Log into the ACP using your email and password specified on registration.
Look for the yellow box on the upper right, and in the row that says 'Free Hosting', click 'View Details'.
There will then be a button that says 'Login to cPanel'.
If you are unable to remember the password to your ACP, then click on 'Forgot my password', located on this page:
https://x10hosting.com/control/login.php