If you r in year 12, I doubt they could do anything. They had to submit the sac marks to VCAA ages ago….
Short of them accidentally putting 0% for one of the sacs, I’m not sure there is much point as well.
Plus - if they no longer have a copy: what’s to say that you just changed it? (Aka rubbed it out, or added a minus sign/etc)
However, if u still think it’s important - perhaps bring it up with your teacher….