Women are obsessed with height, not men, most of us just want a girl who's shorter than us, even if it's just by an inch, some of us don't care if she's taller and many of us will take a taller girl if she's hot enough.
If you tower over American men you could try your luck with all the tall men in Scandinavia or the Netherlands.
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my personal experience: Sweden, Norway, Denmark, Finland, Poland, Germany. All guys I have talked in these countries said they prefer girls +5'10".
For Asia it depends on where you go. Japanese people prefer short and petite girls despite the media. China may be a mixture. Europe is possible because most tall people come from European countries. Asians are usually short unless they just so happen to be on the tall side. Some may like tall people to admire them, but as far as to date? That depends on who you get involved with.