For more accurate estimates, it would be a good idea to include the number of band 6's achieved at your school in each of your subjects (if applicable). However, considering this information, your performance appears to be consistent with an ATAR in the low 80's range. More specifically, that would be an ATAR between 81 and 82.
Business Studies and Legal Studies appear to be your highest-performing subjects, meaning that they will likely make a positive contribution to your ATAR. Because of this, it is important to ensure that you prepare to the best of your ability for the trial exam of each subject (if you have not yet sat your trial exams), so as to maintain (and possibly improve) your position in each subject. Subsequently, your HSC exams provide you with a great opportunity to solidify your overall performance in both subjects, allowing you to ensure that you maximise the contribution of both subjects towards your ATAR.
The same can be suggested regarding PDHPE, although to a slightly lower extent. You should therefore do your utmost to prepare for your PDHPE trial exam and/or HSC exam, which will hopefully lead you to performing at a high standard in this subject.
Your position seems least favourable in English Advanced and Design and Technology. This could indicate that you need to place additional emphasis on your preparations for both subjects, including addressing any areas of improvement and concepts that you may not fully understand or be confident with.
I hope this helps!