Happy Friday, @monica-hawkins.
The penny balance from your customer is a personal choice whether or not you want to keep it. Although you may wish to consult with your accountant before you make that decision. I've listed the steps below to help you out if you decide to delete it:
I suggest making a note when you delete the balance just in case something is off by a penny in the future. That way, you know why it's off and what caused it.
Feel free to comment below if you have any other questions. Have a great weekend!