Junaid,
Looks like you are making great progress. You still need to study up on those weak areas in Planning and Monitoring & Controlling. If it were me, I would not feel comfortable going into the actual exam scoring at that percentage in those areas. I don't know if there is a "safe zone". I have only seen people pass the actual exam scoring Below Proficient (or Below Target) in one group. Keep working at it. I am confident you will know when you are ready and will pass the exam.
Cheers,
Mark