Final answer:
The line suggests Richard Cory was approachable and relatable when speaking, charming to others and contrasting with his tragic end.
Step-by-step explanation:
The description of the way Richard Cory talks in line 6 of the poem most likely means that he was approachable and relatable when he spoke. Despite his upper-class stature as suggested by phrases like 'imperially slim' and 'richer than a king', the use of the word 'human' indicates a sense of humility and connection to others. Furthermore, his mannerism 'fluttered pulses' implies that people were excited or moved by his presence, showing that he had a charming effect on others. The poem contrasts this with the shocking final line where Richard Cory tragically ends his own life, which starkly contrasts with the admired image presented earlier in the poem.