No one can tell you, the cut offs are sorted based purely on supply and demand. They have a quota of spots, say 200, and the 200th person taken in is the ATAR cut off. Having said that, there have been stories of places artificially inflating cut offs (for prestige/to fool hsc students who think that an ATAR is everything and is a measure of the course's difficulty) so they have in the past taken people below it (sometimes up to 10-20), it just depends.