My son is 10 months old and weighs 20lbs and is 30in long. is that normal?

should i start feeding him more? I give him 24-30oz of formula a day and feed him baby food or table food for breakfast and dinner and give him at least two snacks a day (cheerios, goldfish, gerber puffs, etc). He doesn't look unhealthy, but I was told that he's in the 15th percentile!