With this pattern, a rectangle will usually do the trick. Make a 3×5 grid

e	j	m
a	8	4
n	e	g
7	5	t
p	p	4

Now read going left from the top right M

mje48agent574pp

You’ll flip when you’ll get the cipher!

This is a classic keyboard flip. So Q=P, A=;, Z=/

khp85substrate753zr

Maybe the person used the wrong row!

All the letters are from the first row of letters on the keyboard, simply shift them up to numbers

uqiqoptettuoyyieueyiueitietttqtwuput

718190535579668373687385835551527075

Make pairs

71 81 90 53 55 79 66 83 73 68 73 85 83 55 51 52 70 75

Convert decimal to Ascii

GQZ57OBSIDIUS734FK