28,6,10=44.in cat, will my marks increase after scaling? and expected percentile?

90 for sure

Even if they do, its a 2-3 marks increase maximum. The lower the marks get more the number of people in that score. On 120 marks there are 5 people, you take it to 110 there are 20 odd people there. You're looking at 80-85%ile but IMO please prepare for XAT, there's more time and getting 95%ile is very easy if you know your stuff.