Atar estimate please (1 Viewer)

[camsmith]

School Ranking: 168

Trial marks and rankings:
Chemistry - 53% (13/21)
Advanced English - 77% (9/81)
Earth and Environmental Science - 87% (1/13)
Business Studies - 75% (7/64)
General Maths - 67% (3/88)
Studies of Religion 1 - 80% (6/70)

Overall average and rankings:
Chemistry - 66% (14/21)
Advanced English 81% (10/81)
Earth and Environmental Science - 90 (1/13)
Business Studies - 75% (12/64)
General Maths - 79% (3/88)
Studies of Religion 1 - 88% (7/70)

What would be my atar with these results? Also I need an atar of 84, how would I need to go in final exams to achieve this?

 

[Green Yoda]

86