How to display the reset button only?

I have added the clear form button, but because it is at the bottom of the 100 question quiz, I would like it at the top of the form (but not with the submit button) so that if students want to take the test again they could clear the form at the beginning of the test.

I would suggest you to add the submit button and then the reset button, both at the top of your form, then you will need to get the field ID so you can apply some CSS code to hide the submit button and show the reset button only. 

Here is how to get the button ID.

Then replace the ID shown in the code below with the ID you will copy from the wizard:

#ID{

display:none;

}

This guide will help you to inject the code: 

How-to-Inject-Custom-CSS-Codes

Hope this helps.