Given this information, it seems that your performance is consistent with an ATAR in the low 90's range. More specifically, that would be an ATAR between 90 and 93, which essentially makes this estimate consistent with scaryshark09's estimate.
Mathematics Extension 1 appears to be your best-performing subject. Assuming that your cohort is as academically capable as last year's cohort, the same can be suggested regarding Music Extension, despite your rank. This means that both of these subjects are likely to make a positive contribution to your ATAR. You should therefore prepare for your Mathematics Extension 1 HSC exam and your Music Extension component to the best of your ability to maintain this favourable standard of performance.
The same can be suggested about your performance in Mathematics Extension 2 and Chemistry, although perhaps to a slightly lower extent. Based on this, you may wish to consider whether there are any areas of improvement that you may need to address as you prepare for your Mathematics Extension 2 and Chemistry HSC exams, which will hopefully allow you to maximise your HSC exam mark and bring you closer to your ATAR goal.
This leaves us with English Advanced and Music 2, which seem to be your lower-performing subjects, with Music 2 being your lowest-performing subject. Here, thorough preparations that include a focus on addressing areas of improvement would enable you to solidify your performance in both subjects, which is especially important for English Advanced, since it will count as 2 units towards your ATAR. Doing this will hopefully maximise your chances of reaching your desired ATAR.
Overall, your ATAR goal is definitely within reach.
I hope this helps!
