Battery health to 98% just with 68 cycles. Is that normal?

Perfectly normal.

On average, you can expect a 1% decline for every 25 charge cycles.

So, 68 Charge Cycles divided by 25 = 2.7%.

Right at about 75 Charge Cycles, your Battery Health will be at 97%.

Yes, I would say that is normal. They typical Apple Battery lasts about 2 years with regular usage. When Battery Health reaches 80%, Apple suggests that you have it replaced at any Apple Store. Check this link...

Batteries - Maximizing Performance - Apple