I wouldn't rely on your score to determine if you will pass the PMP exam (as stated in the disclaimer of practice tests and exams). My scores were inconsistent but I would focus on the ones that I would get wrong and go back to my resources (PMBOK, prepcast, youtube videos) to review the concepts. If you are scoring a 70% and above, I believe a you have a solid foundation on the material. I took my PMP exam today and passed on my first attempt! I would definitely recommend taking a practice exam (if you haven't already do so) to help with managing the timing of the exam. I did a bunch of 20, 30, 40 question quizzes but never attempted a full prep exam and used up all my time to the very last minute to answer all the questions leaving no time to review marked questions. Regardless, you are headed in the right direction. Best of luck!