What I decipher from that table is you need distinction *average* Bach to
meet the minimum notional ATAR 92 requirement; a little lower for Grad Dip being credit average, a little lower again for Master/PhD being awarded = pass average. They can't lower it any more for Master/PhD can they?
Note that Bach distinction average isn't equiv to GPA 6.0. In D=75+ scale, an average of 75% means you have around half >75 half <75 so equate to GPA 5.5 to meet the minimum, which isn't far from WSU's 5.4 for example.