Yea those marks mean nothing. Find out your internal ranks if you can cause the only thing that goes to your uai is your rank and the hsc marks of you and your peers.
Having said that though, you seem to be doing really well in everything but 2u maths and physics but only top 8 or 10 (can't remember) units count so if those marks have put you up high in ranks and you study hard for hsc exams you'll get way above 85.
Well going by that if your 2u maths doesn't count, physics is a good rank and the people ranked above you in the other subjects do really well then you should get 85+ if you study well.