If a person looks up and to their left they are looking in an area that will stimulate their brain to access visual or picture information related to items (ideas or thoughts) they are remembering. Great spellers, language learners and people with photographic memories tend to store their information here as well as use this as an access point for their memory strategies.
Try it: Think of the last time you saw a bird. Or, visualize yourself some time in the past, maybe 2 weeks or 2 days ago. Where are you looking to create this picture?
It is thought that 80% of people in North America are dominantly visual in the way that they learn and process information. This doesn't mean they aren't capable of using their other senses. They just have a preference. And, even though they dominantly use visual ways of processing it doesn't mean that they don't go through other sense to complete their processing. Generally, we use many more of our senses to process information. So 80% of North Americans (maybe) mostly start visually and then use some other sense and then another sense and on and on - This accounts for our very different and unique learning and information processing styles and explains why so many people these days are diagnosed with learning disabilities who aren't really learning disabled.