Verified answer

I don't recall having studied magnetic fields, but I'll give it a shot.

magnetic moment µ = I*A

where I is the current in the loop = 3.33 A

and A is the area = πr² = π(L/2π)² = L² / 4π = (6.72e-2m)² / 4π = 3.59e-4 m²

so

µ = 0.00120 A·m²

torque τ = µ x B

and the torque is at a maximum when µ and B are perpendicular, making

max τ = 0.00120A·m² * 8.42T = 0.0101 N·m

Does that look reasonable to you?