Downloading the key for Nericon's garden may/should open the graveyard gate (it would in v1.32, I have not tested this with a v1.32 key in a game started with v1.34).
Lost Items - guide and directory of inventory files

Otherwise, save the game at the graveyard gate. When hex editing, leave the X value as is, and reduce the Y value to move yourself north. In Windows' Calculator, switch to hex mode (Scientific View), type in the second pair of numbers in the Y value, switch to decimal mode, subtract 15 (or so), switch back to hex mode, and use that value for your new character position. You could also just guesstimate the Y value, but unless you are familiar with hex values, switching to decimal will give you a better idea of how much change in the coordinates will move your character.

X = 00 53 ; Y = B0 12 ; map 00 - in the graveyard, at the exit from Iona's dungeon