Have you identified any specific areas where you're struggling? Are you using different study resources and practice exams? Have you considered joining a study group or getting a tutor? Good luck with your exam!
I was on a plateau when I was studying for my exam too. Here's some of the things I did to improve my mock exam scores:
-I reread the PMBOK 2 more times
-I connected the PMBOK principles with real life PM experience
-I introduced additional study materials to my routine (ie. I bought the RIta book)
I've been studying for PMP exam since OCT 2019. I put a lot of time and effort into this preparation, however, somehow I keep on failing the precast exam and now I'm doing worse.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®
