84c for a processor is normal ?? even after adding a new fan ??
It would be at the hotter end of normal but nothing to be overly concerned about. Alot depends on ambient temp as well. Set your rear fan to exhaust, front and side to intake and then take the temps again. Temps in the mid 70's are normal for full load with good airflow. Speaking of which, make sure your cables do not look like a birds nest. Bad cable layout will definately reduce airflow and increase temps.