We strongly suggest that you don't change the root MySQL password, as it can cause issues with MySQL starting correctly. This is a cPanel bug within the cPanel VPS software that they should be addressing.
If you wish to view your MySQL root password, you can. Please do the following:

1. Login to your SSH (Secure Shell)
2. Run the following command # cat /root/.my.cnf
3. It should show you something that looks like this:

   Password = **************

That's it! You're your MySQL root password is mentioned above.