This is really no big deal biologically. Think of DNA as the actual code and of chromosomes as the modules/files that hold it. The man in question still has all the "code" that a normal human has except some of those modules got accidentally concatenated. It is sort of irrelevant to individual survival (except for reproduction/future generation) how the code is organized as long as it is present in its entirety.

Similar events happen all the time. I worked at a clinical genetics lab for a while, and some tests that were performed (FISH analysis) tested for whether a fragment of one chromosome is "embedded" within another. The term is chromosomal translocation. Apparently there are quite a few translocations that are completely benign and happen all the time. Usually the bigger the translocation, the higher the chance that something goes wrong. However, when an entire chromosome is translocated, the boundaries of one of the chromosomes remain intact, so there is no surprise that it happens.