You can only access your x10hosting database from within x10hosting, either by scripts you install on your account, or by using the phpMyAdmin in cPanel.
You can not access the database server from an IP address outside of our network (only localhost connections allowed). And you would not be able to use phpMyAdmin installed as a script in your account to access a mysql server located outside of our network, it should however be possible to install phpMyAdmin in your account and access your x10hosting database.
If you however have trouble accessing a database you created through cPanel in your account, by using phpMyAdmin from within cPanel, please let us know what error you get if any.