Begin by completely powering off your Motorola Moto G84. Hold the power button until the power menu appears, then select 'Power off'. Wait until the device is fully powered down.

Use a plastic opening tool to gently pry around the edges of the back cover to release the clips. Carefully lift the back cover off and set it aside.

Using a Phillips #00 screwdriver, remove the screws securing the battery connector shield. Use a plastic spudger to disconnect the battery connector from the motherboard. This step is crucial to prevent any power surge during the repair.

Using a heat gun or hairdryer, apply gentle heat around the edges of the screen to loosen the adhesive. Do not overheat the device; use short bursts of heat.

Attach a suction cup near the top edge of the screen and gently lift to create a gap. Insert a plastic opening tool into the gap and slowly work your way around the screen to release the adhesive. Once loosened, carefully lift the screen away from the frame.

Locate the display cable connector and gently disconnect it using a plastic spudger or tweezers. Remove the old screen completely.

Attach the new screen's display cable to the motherboard connector. Align the new screen with the frame and press down gently to adhere it using new adhesive strips.

Reconnect the battery connector to the motherboard and secure it with the screws that were removed earlier. Ensure the connection is firm.

Align the back cover with the device and press down around the edges to snap it back into place. Ensure all clips are secured.

Power on your Motorola Moto G84 and test the new screen for responsiveness and proper display. Ensure all functions are working correctly before concluding the repair.