Good morning Miguel,
The performance statistics that PM PrepCast gathers from mock test results are incredibly helpful for showing you exactly where you stand right from your very first test.
Please watch the following video for a better understanding of the numbers:
https://www.youtube.com/watch?v=AYbt2bpp8g8
Use the statistics as a great baseline to track your progress, but stay focused on mastering the actual mindset.
I passed my PMP Exam last April and I posted my "Lessons Learned" in this forum. I recommend you to read it specially the last part of the post.
Good luck tomorrow on you exam.
Sincerely,