Hi! I'm also 6 2 . I went the other way with my Cube reaction pro, reducing the front by 2 teeth which for me was much better riding (I have a high cadence). Don't worry about the chain line it is only ever inline for one gear. Couple of teeth either way should fit, just measure the ring diameter. You will need special tools, a crank puller and a spider for the castle nut. Use a thread lock on the threads on assembly and torque them properly as they have a habit of working loose.
Hope this helps
Nigel