Move over, millennials. Step aside, Gen X. Bye-bye, baby boomers. There’s a new kid (with money) on the block, and as she gets older, she’s going to become more important to retailers.Teenagers today belong to what’s been coined Generation Z—­referring to those born after 1995—and the way they live and think is different from the mindset of their millennial siblings. (Some say the first members of Gen Z were born as early as 1995 and as late as 2001.)  There’s good news and bad with people in this generation: They have disposable income (to the tune of $44 billion a year, according to market research company Mintel), they respect good deeds, and they’re very influenced by what their peers are buying. However: Gen Zers are shopping more online than in brick-and-mortar stores. They probably won’t get married anytime soon because we’re all tying the knot later,