How to configure Storyline 360 / Reach 360 to generate certificate with 100% score only

Hello,

We are using Storyline 360 to convert a PowerPoint training into an Articulate class. We added 20 quiz questions to the end of the slides in Storyline. We are planning to use Reach 360 as our LMS. We formatted the Certificate of Completion in Reach 360, but we want that certificate to only generate if the user gets a 100% score on their assessment. How do we configure this in Storyline?