lol at the down-votes to my post. You can deny it all you want, but a <75%ile in the real UMAT is not going to get you many interviews around Australia, and even less places. Last year was probably the /only/ year Monash has given offers to people with UMATs that low, it's an anomaly and not representative of the other medical faculties in Australia. It's not me being a mean person or me enjoying crushing peoples' hopes, it's actually the truth.
Optimism is fantastic and it's definitely more productive than pessimism, but I think it's important to maintain a grasp on the reality of any situation you're in, a notion which is important for your own academic aspirations and also probably particularly important when it comes to working in hospitals.
If you're going to ask whether a 65-75%ile is a good UMAT score, I'm not going to say "yes". It's not "good" and it's not a safe score, and anyone who says otherwise needs some very strong justification with their opinion. However, that doesn't mean you won't get into medicine, it's widely accepted that Medentry is harder than the real test and your percentile is a comparison to the future top performers in the UMAT. I'd have loved to say "yes, it's a fantastic score!" and I would have if I thought that would have done you any good, but honestly, I think it's important to come back to reality. In the past 5+ years (not sure about last year) the median percentile has been around the 95 mark for metro applicants, keep that mind, that's the standard.
You sound a lot like the user "Hotcurry" (or w/e the name was, I mean not many users have "homeschooled" down on their profile), and if so, it seems you've done a lot of reading about the UMAT already. I think you knew the answer before you posted here.