Hi George,
the rule of thumb says, You should score consistently in the 80s to be able to take the exam confidently. so My advise is, you need to spot the areas where you score less and start working on them to enhance your overall scores. The good news is you still have 3 weeks; which I think more than enough to achieve your goal if you utilize them wisely.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®