Central Board Of Secondary Education [CBSE] — Moderation of numbers

Sir, I am not satisfied with my 12 results. I got 90 percent in 10 and also I was very good at each UTs and final exams in 11 & 12. I was expecting more than 90percent this year but I got very low marks in yesterday result. When I asked about my marks from school officials, they told me that your marks have been lowered by cbse due to moderation policy. Sir I want to know what type of moderation is this when students who are below average are getting 85 percent and brilliant and aspiring students preparing for IIT and CA are given low marks. CBSE has no right to play with our future. Please look into the matter as I think there are many mistakes done by school level also because their favourite students have got much better marks then they expected. My name is Aryan Agarwal from DR. MARIA RESIDENTIAL ACADEMY, school code 60039
Pls sir look into the matter ASAP as I am unable to concentrate on my further studies seeing this result.