How can I create a survey in which the user sees their results after they complete?

You can create Autoresponder email and send your users copy of the data they have submitted. Inside of this guide you can find how to create a form Autoresponder:

https://www.jotform.com/help/26-Creating-a-Form-Autoresponder 

You can also create a Quiz form or Exam form with our Quiz Form app: https://apps.jotform.com/app/quiz_form 

Turn your form into a Quiz or Exam!

Hope this will help. Let us know if you need further assistance.