To find the Fortbyte number 94 of the decryption challenge, you must first equip yourself with the Scarlet Scythe pickaxe, which belongs to the whole Meta skin and is automatically unlocked when the player reaches level 87 of the battle pass.
Then go to the frozen lake north of Polar Peak at the former Greasy Grove site and dig into the roof of the ice-covered building in the middle of the lake to fall in. There a blue canoe waiting for you hanging on a wall. Destroy it with the pickaxe to make the Fortbyte appear.