n = 1:10;  g = 1 - .6^(3*n) * 2.2^n
min(n[g>.95])
## 5
cbind(n, g)
       n         g
 [1,]  1 0.5248000
 [2,]  2 0.7741850
 [3,]  3 0.8926927
 [4,]  4 0.9490076
 [5,]  5 0.9757684   # <-- exceeds .95.
 [6,]  6 0.9884851
 [7,]  7 0.9945281
 [8,]  8 0.9973998
 [9,]  9 0.9987644
[10,] 10 0.9994128