There are two methods that you can use to reset your cPanel password. The best method is from your Deluxe Hosting client area. The other is from your cPanel login page. You can find a guide on using the client area here.
The other method requires that you access your cPanel login page. You can find a guide on how to access your cPanel here.
You will also need to know your cPanel username and the email that cPanel is set to use for administrative notices. If you do not know this information, you can find it in your cPanel, which you can access from your Deluxe Hosting client area. But, you can easily reset your cPanel password from the same page that you access your cPanel, so you might as well do it there.
If you do know your username and email address, you can reset your cPanel password from cPanel directly.