Yeah, to plot reset, you start your game with a new character, not your mayor or an existing character, you run around town and see where the new villager is plotted. If they are plotted in a good spot, you get your house and talk to Isabelle and the game automatically saves after you tell her your birthday and all that stuff that you already know. Then you can delete that character and your villager will still be plotted in the same spot. If the villager is not plotted in a good spot, shut the game down start it back up rinse and repeat until the villager is plotted in a good spot. It's time consuming and annoying, especially having to listen to Isabelle's long winded tutorial on meow coupons and blah blah but it's worth it to have your town organized the way you want.