You can't really say because the assessment marks vary from school to school.
So saying getting average of 70's in one school may be equivalent of getting 90's in another school.
There is no real accurate way of saying, not to mention the marks required vary from subject to subject.
But...
fkn ellipses posting pics of me in the love and relationships thread ---______---
this means warrrrrrrrrrrrrrrrrrrrrrrrrrrrr. i still got an arsenal of your pics. bring it on
I believe you can apply for the EAS (Educational Access Scheme), which will take your situation into account and allow you to get into some courses where your UAI is slightly lower.
More information is provided in this thread.
http://www.boredofstudies.org/community/showthread.php?t=24845...
It really depends how poor your performance is.
A lot of people who -think- they aren't going to do well, may actually find out that their marks fair quite well. That's why this forum is great help in understanding where you stand.
If your HSC mark was also the highest exam mark i.e. 90, then yes that will become your moderated assessment mark.
The 90 that you see has already gone through the process of aligning.