The generator matrix

 1  0  0  1  1  1  X  1  1  X  1  X  1  0  1  1  X  1  X  1  1  1  0  0  1  X  1  0  1  X  1  1  0  1  1  0  1  X  1  X  1  0  1  1  X  1  1  X  X  1  1  1  1  0  0  0  X  X  X  X  0  0  0  0  1  1  1  1  1  1  1  1  1  0  1  1  X  1  0  1  X  1  X  X  X
 0  1  0  0  1 X+1  1  X X+1  1  0  0  1  1  X X+1  1  1  X  X  1 X+1  X  1  0  1  X  1  0  1  1  0  1 X+1  X  1 X+1  0  X  1  1  0  X  0  X  1 X+1  1  1  X  0 X+1  1  1  1  X  0  0  X  X  X  X  0  0  0  0  X  X  X  X  0  0  1  1 X+1  1  1 X+1  0  1  X X+1  0  1  1
 0  0  1  1 X+1  0 X+1  1 X+1  X  X  1  X  1  1  X  1  1  1  0  0  1  1  0  1  X  X X+1  0  1 X+1  X X+1 X+1 X+1  X  X  1 X+1  0  0  1  X X+1  1  1  0  0 X+1  0 X+1  1  X  X  1  1  0  X  X  0  0  X  X  0  0  X  X  0  1 X+1 X+1  1  1  0  0  1  1  X  1 X+1  1 X+1  X X+1  0
 0  0  0  X  X  X  0  0  0  X  X  X  0  X  X  X  0  X  0  0  0  0  X  X  0  0  X  X  X  X  0  0  0  X  X  X  0  0  0  0  X  X  0  0  X  0  0  X  X  X  X  X  X  0  0  0  X  X  X  X  X  X  X  X  0  0  0  0  0  0  0  0  0  0  0  X  X  0  X  X  X  0  0  X  0

generates a code of length 85 over Z2[X]/(X^2) who´s minimum homogenous weight is 84.

Homogenous weight enumerator: w(x)=1x^0+89x^84+29x^88+6x^92+1x^96+1x^100+1x^104

The gray image is a linear code over GF(2) with n=170, k=7 and d=84.
As d=84 is an upper bound for linear (170,7,2)-codes, this code is optimal over Z2[X]/(X^2) for dimension 7.
This code was found by Heurico 1.16 in 0.25 seconds.