An 88-yr old patient stopped breathing for a minute or two and was resuscitated by cpr, then he responded to questions by blinking his eyes once and moving his eyes many times on the first two days after the incident. But he cannot respond by grabbing ot

Hypoxic brain injury. Your description sounds like he had a hypocic brain injury. He may recover with time but he may have some permanent deficits as well.
Anoxic brain injury. There are multiple possible explanations for the brain injury after resuscitation, including stroke and seizure. But if the patient stopped breathing for an extended period, requiring cpr, there likely was a global anoxic brain damage (diffuse injury from no oxygen). This type of injury affects many brain functions. There can be gradual and continued improvement over many months.