I mean I am of normal height about 5'11'', people keep saying if you are under 6' tall, girls will not be interested, but I am pretty sure height hasn't come in my way of anything in terms of female attention or peers teasing you and some of my friends are 6' plus, tallest being 6'4'' and they aren't doing any better in the game or seem to have any advantage.
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It matters a lot for men, it's not the be all end all, but being 6ft plus is a massive advantage in matters of pretty much any social interaction, especially intimidation and seduction. But 5'11 is good, and most will think you're 6ft anyway because most are terrible at judging height.
Here's some polls from this site to back me up, you can research studies for more evidence. www.girlsaskguys.com/.../q1317372-if-a-guy-is-tall-how-much-more-attractive-does-that-make-him